<!DOCTYPE html>
<html>
<head>
	<meta charset="UTF-8">
	<title>4-1</title>
</head>
<body>
	<h3>分页导航</h3>
	<a href="first.html" target="iframe">第一页</a>	
	<a href="second.html" target="iframe">第二页</a>
	<a href="last.html" target="iframe">最后一页</a><br>
	<iframe src="" frameborder="0" name="iframe"></iframe>
</body>
</html>